calistoga, a safe distance away >> reporter: this is as close as they will let us get. if you look over my shoulder, you can see crews are building a butcher out of sandbags and bomb detecting robot in the mix. authorities have been out here for hours, fire department, bomb squad, police, sheriff. they have to detonate medical ether they found a case, 96 canisters, quarter pound, found in a storm shed with other medical supplies. they believe they were part of a disaster supplies it can for a 200-bed hospital and that had been stored here for decades. the crate with the ether in it was marked 1957. >> because of the age of them, most of it was trashed, junk. in that process, there was a case of ether. and so, it is not something that you can throw in the trash.